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1. At Station No. 1, wash the contaminated equipment in a tub containing water <br />mixed with a phosphate -free industrial strength soap such as Liqui -Nox. <br />2. Move the equipment to the wash tub in Station No. 2. First, rinse the <br />equipment with DS /DI water. If high concentrations of metals are anticipated <br />or encountered, rinse the equipment with dilute (0.1 Normal) nitric acid <br />(HNO3) and follow with two more rinses using DI /DS water. <br />3. At Station No. 3, place the clean equipment on plastic sheeting until it is used <br />again. Water sampling equipment that will not be used immediately shall be <br />wrapped in clean plastic. <br />1.4.3 DISPOSAL OF DECONTAMINATION MATERIALS <br />Based on the sample data results from previous investigations and anticipated <br />quantity of material, disposal of investigation- derived waste shall consist of the <br />following: <br />1. Following the decontamination of sampling equipment, the disposable gloves <br />and used plastic from Station No.3 shall be placed in garbage bags and <br />disposed of in a municipal solid waste disposal facility. <br />2. Where permissible by local regulation or official authorization, the wash and <br />rinse water from Station No.1 and No.2 shall be disposed of on the ground <br />surface or the sewer system at the location of decontamination; otherwise, <br />the wash and rinse waters shall be collected and transported off site for <br />proper disposal. <br />1.4.4 DECONTAMINATION OF SAMPLING PUMPS <br />When samples are collected by sampling pumps, sampling shall begin with the well <br />containing the lowest anticipated analyte concentration. Successive samples should <br />be obtained from wells anticipated to have increasing analyte concentrations. Use of <br />dedicated pump equipment is preferable when feasible. <br />When pumps (e.g., submersible or bladder) are submerged below the water surface <br />to collect water samples, they should be cleaned and flushed between uses. This <br />cleaning process consists of an external detergent wash and high - pressure tap water <br />rinse, or steam cleaning, of the pump casing, tubing, and cables, followed by a flush <br />of potable water through the pump. This flushing can be accomplished by pouring <br />clean tap water from a carboy into the end of the discharge tube and working it <br />down to the inside of the pump. The procedure should be repeated; then the tubing <br />and inside of the pump should be rinsed with DI /DS water. Alternatively, the <br />Apri12013 <br />